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WO1989008153A1 - Procede de mise en oeuvre de processus pyrometallurgiques reducteurs avec des boulettes - Google Patents

Procede de mise en oeuvre de processus pyrometallurgiques reducteurs avec des boulettes Download PDF

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Publication number
WO1989008153A1
WO1989008153A1 PCT/DE1988/000097 DE8800097W WO8908153A1 WO 1989008153 A1 WO1989008153 A1 WO 1989008153A1 DE 8800097 W DE8800097 W DE 8800097W WO 8908153 A1 WO8908153 A1 WO 8908153A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
reducing
cylindrical
nozzles
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1988/000097
Other languages
German (de)
English (en)
Inventor
Ulrich Bock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE19863629661 priority Critical patent/DE3629661A1/de
Application filed by Individual filed Critical Individual
Priority to AU13666/88A priority patent/AU1366688A/en
Priority to PCT/DE1988/000097 priority patent/WO1989008153A1/fr
Priority to CA000560115A priority patent/CA1327275C/fr
Publication of WO1989008153A1 publication Critical patent/WO1989008153A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • F27B3/225—Oxygen blowing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]

Definitions

  • the invention relates to a method for carrying out reducing pyrometallurgical processes with pellets from oxidic ores, concentrates or intermediate products, and also metallic intermediate products by means of strongly reducing gases or oxygen-containing gases for producing and refining a metal melt. Such methods are used, for example, to recover precious metals from corresponding waste containing precious metals. The main thing here is that other waste is removed as quickly and safely as possible by incineration.
  • the inventor has set himself the goal of developing a new method here which considerably improves the known methods with regard to the speed and completeness of the combustion.
  • the reducing gas leads through at least three nozzles onto the surface of a batch, which is located in a cylindrical, axial furnace space, at a speed of greater than 100 m / sec. and less than 300m / sec. is inflated, and that the gas deflected at the point of impact and rising again with high contents of CO and H_ is still burned in the cylindrical furnace chamber by air blown secantially into the furnace chamber.
  • a lance burner is introduced centrally in a cylindrically shaped furnace space to introduce the reducing gas.
  • This lance burner is designed as a pulse burner.
  • a strongly reducing flame of gases, such as methane or propane in pure form or mixed with little oxygen, is blown onto the charge inside the cylindrical furnace chamber through its nozzles.
  • gases or oxygen gas mixtures with a speed of at least 100m / sec. emerge from the nozzle and hit the surface of the bath with such an impulse that a slight movement of the bath melt is produced. Due to the high tangential velocity of the gas in the upper part of the cylindrical furnace chamber of approx. 30-50 m / sec., A longer residence time of the gas of at least 5 seconds at a temperature level of at least 1000 ° C is guaranteed.
  • the high turbulence of the circulating gas stream creates kinetic conditions for intensive combustion processes, so that together with the longer residence time, organic substances which may be contained in the batch are also destroyed.
  • the longer residence time of the gas at a high temperature level in the cylindrical top furnace also has a positive influence on the particle formation of the metal oxide formed by combustion.
  • a larger grain is formed, which takes on a spherical shape due to the high turbulence caused by abrasive action. These oxides do not tend to stick and can therefore easily be collected in filters with very dense fabrics.
  • An advantage of this invention is that the reducing gases methane or propane on the way from the lance nozzle to the batch surface are essentially not heated by partial combustion, ie using their own chemical heat content as is done in conventional inflation processes, but by radial and convective Heat transfer from the partially afterburned exhaust gas, which circulates around the reduction jet.
  • the reduction jet occurring on the batch does not cause overheating at this point, so that at high reduction rates and degrees of reduction only the metals with high vapor pressure evaporate at temperatures below 1300 ° C.
  • a lance burner 1 also protrudes into the furnace chamber 10, which in the present case is water-cooled and has three nozzle heads with burner nozzles 9. In the position of use, these burner nozzles 9 emit pulse firing jets 8, which strike a surface 11 of a molten bath 4.
  • These focal beams consist, for example, of gases such as methane or propane in pure form or mixed with a small amount of fuel.
  • the cylindrical furnace chamber 10 is designed such that the gases deflected at the point of impact rise along the wall of the cylindrical furnace chamber 10 at a significantly reduced speed.
  • two axially parallel air nozzles 6 open into the furnace chamber 10, via which fresh air is blown in secantially. This leads to a rapid combustion of the rising gases. The heat released thereby essentially serves to heat up the combustion jets
  • a focal jet 8 can have an oxygen particle pressure PO-10-12at and causes extremely high reduction conditions at temperatures between 1000 ° and 1300 ° C. on the surface of the batch.
  • the flame striking the batch or bath surface is deflected, sweeps across the surface and causes a stirring effect in the melt.
  • the mass flow achieved by convection between the batch and bath surface and the reduction flame leads to a reduction in the metal oxides in the melt.
  • the cylindrical furnace chamber is designed in such a way that the gases of the lance burner deflected at the point of impact meet at a speed of less than 1 m / sec. rise along the wall of the cylindrical furnace chamber.
  • the gases rising on the side walls of the cylindrical furnace chamber and still containing CO and H are afterburned by tangential air entering the upper part of the cylindrical furnace chamber at high speed. This introduction takes place through one or two nozzles and at a speed of more than 100 m / sec. This leads to a rapid partial combustion of the rising gases.
  • the heat released serves essentially to heat up the reduction flame, which is relatively cold in a strongly substoichiometric mode of operation, so that the free jet of the gas lance burner can have an oxygen particle pressure of PO 2 ⁇ 10 -12at and extremely high reduction conditions at temperatures between 1000 ° and 1300 on the batch surface ° C causes.
  • This enables intensive reduction work with a considerable reduction in energy expenditure.
  • metals with high vapor pressures such as As, Zn, Cd and Bi can also be volatilized from the batch.
  • the secondary post-combustion including that of the metal vapors, is carried out by supplying combustion air at high speed.
  • the remaining post-combustion for example also of the metal vapors, is carried out by further secant supply of combustion air at high speed.
  • the speed at which the gases are blown into the furnace chamber 8 should be at least 100 m / s. They then rise on the wall of the furnace chamber 10 at a speed of less than 1 m / s until they then reach the area of the air nozzles 6. There they are deflected by the secant air jets, so that these gases have a high tangential velocity of approx. 30 to 50 m / s in the upper part. This results in a longer gas residence time of at least 5 seconds at a temperature level of at least 1000 ° C.
  • 100 kg of mixed oxide pellets were melted in a cylindrical furnace 10 with a diameter of 0.5 m and a height of 0.7 m, which 40% Pb, 25% Sn, 4% Zn, 0.5 Cd and 0.5% Bi contained.
  • 10% fine coal was added to the pellet.
  • 8 kg of propane per hour were blown through lance 1 with three nozzle heads. The partial post-combustion took place via the lower air nozzle 6, and then the complete post-combustion took place via the upper air nozzle 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Le procédé susdit permet de mettre en oeuvre des processus pyrométallurgiques réducteurs avec des minerais oxydés, des concentrés, des produits intermédiaires ou des produits intermédiaires métalliques au moyen de gaz fortement réducteurs ou de gaz contenant de l'oxygène, afin de fabriquer et de raffiner une masse fondue métallique. A cet effet, le gaz réducteur est injecté par au moins trois ajutages sur la surface d'une charge située dans la cavité cylindrique axiale d'un four à une vitesse supérieure à 100 m/s et inférieure à 300 m/s. Le gaz ascendant dévié du point d'impact et présentant une haute teneur en CO et en H2 est brûlé encore dans la cavité cylindrique du four par l'air injecté dans celle-ci selon une sécante.
PCT/DE1988/000097 1986-08-30 1988-02-25 Procede de mise en oeuvre de processus pyrometallurgiques reducteurs avec des boulettes Ceased WO1989008153A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19863629661 DE3629661A1 (de) 1986-08-30 1986-08-30 Verfahren zur durchfuehrung reduzierender pyrometallurgischer prozesse mit pellets aus oxidischen erzen, konzentraten oder zwischenprodukten, sowie metallischen zwischenprodukten mittels stark reduzierender gase oder sauerstoffhaltiger gase zur erzeugung und raffination einer metallschmelze
AU13666/88A AU1366688A (en) 1988-02-25 1988-02-25 Process for implementing reducing pyrometallurgical processes with pellets
PCT/DE1988/000097 WO1989008153A1 (fr) 1988-02-25 1988-02-25 Procede de mise en oeuvre de processus pyrometallurgiques reducteurs avec des boulettes
CA000560115A CA1327275C (fr) 1988-02-25 1988-02-29 Procede de reduction continue pour procede de pyromineralurgie avec boulettes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU13666/88A AU1366688A (en) 1988-02-25 1988-02-25 Process for implementing reducing pyrometallurgical processes with pellets
PCT/DE1988/000097 WO1989008153A1 (fr) 1988-02-25 1988-02-25 Procede de mise en oeuvre de processus pyrometallurgiques reducteurs avec des boulettes
CA000560115A CA1327275C (fr) 1988-02-25 1988-02-29 Procede de reduction continue pour procede de pyromineralurgie avec boulettes

Publications (1)

Publication Number Publication Date
WO1989008153A1 true WO1989008153A1 (fr) 1989-09-08

Family

ID=88404440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1988/000097 Ceased WO1989008153A1 (fr) 1986-08-30 1988-02-25 Procede de mise en oeuvre de processus pyrometallurgiques reducteurs avec des boulettes

Country Status (4)

Country Link
AU (1) AU1366688A (fr)
CA (1) CA1327275C (fr)
DE (1) DE3629661A1 (fr)
WO (1) WO1989008153A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202024001174U1 (de) 2024-06-19 2024-07-19 Richard Rupprecht Gmbh Mobiler Vergusskocher mit einem stufenlos regelbaren hydraulischen Fahrantrieb

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629661A1 (de) * 1986-08-30 1988-03-10 Ulrich Bock Verfahren zur durchfuehrung reduzierender pyrometallurgischer prozesse mit pellets aus oxidischen erzen, konzentraten oder zwischenprodukten, sowie metallischen zwischenprodukten mittels stark reduzierender gase oder sauerstoffhaltiger gase zur erzeugung und raffination einer metallschmelze
DE3915740A1 (de) * 1989-05-13 1990-11-15 Ludger Schumacher Einrichtung zur durchfuehrung von hochtemperaturprozessen
NL1009412C2 (nl) * 1998-06-15 1999-12-16 Gibros Pec Bv Werkwijze voor het in een ovenruimte pyrometallurgisch verwerken van metaalhoudend afval.
DE102020215140A1 (de) * 2020-12-01 2022-06-02 Sms Group Gmbh Verfahren und Einschmelzaggregat zum pyrometallurgischen Einschmelzen von metallhaltigen Rohstoffen, Reststoffen und/oder Sekundärreststoffen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1168202A (fr) * 1956-03-31 1958-12-05 Procédé pour la fabrication de la fonte au haut fourneau par insufflation d'air, en partant de minerais menus ou fins, sans agglomération préalable, four pour la mise en oeuvre de ce procédé et tuyère employée dans ledit four
FR2384848A1 (fr) * 1977-03-25 1978-10-20 Samancor Management Services Hauts fourneaux perfectionnes et leur procede d'utilisation
DE2922189B1 (de) * 1979-05-31 1980-10-09 Kloeckner Humboldt Deutz Ag Verfahren und Vorrichtung zur Verhuettung von schmelzbaren Stoffen wie Erzkonzentrat
US4671765A (en) * 1986-02-19 1987-06-09 Ppg Industries, Inc. Burner design for melting glass batch and the like
DE3629661A1 (de) * 1986-08-30 1988-03-10 Ulrich Bock Verfahren zur durchfuehrung reduzierender pyrometallurgischer prozesse mit pellets aus oxidischen erzen, konzentraten oder zwischenprodukten, sowie metallischen zwischenprodukten mittels stark reduzierender gase oder sauerstoffhaltiger gase zur erzeugung und raffination einer metallschmelze
DE3638204A1 (de) * 1986-11-08 1988-05-11 Kloeckner Humboldt Deutz Ag Verfahren und vorrichtung zur verhuettung schmelzbarer stoffe wie erzkonzentrat unter ausnuetzung des unverbrauchten reduktionsgases aus dem aufblasprozess im schmelzzyklon

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2645585C3 (de) * 1976-10-06 1979-08-30 Wolfgang Prof. Dr.-Ing. 1000 Berlin Wuth Verfahren zur kontinuierlichen oder diskontinuierlichen Behandlung von geschmolzenen schwermetalloxidhaltigen Schlacken zur Freisetzung von Wertmetallen und/oder deren Verbindungen
FI54809C (fi) * 1977-04-06 1979-03-12 Outokumpu Oy Foerfarande foer suspensionsmaeltning av sulfidkoncentrat
FI66648C (fi) * 1983-02-17 1984-11-12 Outokumpu Oy Suspensionssmaeltningsfoerfarande och anordning foer inmatningav extra gas i flamsmaeltugnens reaktionsschakt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1168202A (fr) * 1956-03-31 1958-12-05 Procédé pour la fabrication de la fonte au haut fourneau par insufflation d'air, en partant de minerais menus ou fins, sans agglomération préalable, four pour la mise en oeuvre de ce procédé et tuyère employée dans ledit four
FR2384848A1 (fr) * 1977-03-25 1978-10-20 Samancor Management Services Hauts fourneaux perfectionnes et leur procede d'utilisation
DE2922189B1 (de) * 1979-05-31 1980-10-09 Kloeckner Humboldt Deutz Ag Verfahren und Vorrichtung zur Verhuettung von schmelzbaren Stoffen wie Erzkonzentrat
US4671765A (en) * 1986-02-19 1987-06-09 Ppg Industries, Inc. Burner design for melting glass batch and the like
DE3629661A1 (de) * 1986-08-30 1988-03-10 Ulrich Bock Verfahren zur durchfuehrung reduzierender pyrometallurgischer prozesse mit pellets aus oxidischen erzen, konzentraten oder zwischenprodukten, sowie metallischen zwischenprodukten mittels stark reduzierender gase oder sauerstoffhaltiger gase zur erzeugung und raffination einer metallschmelze
DE3638204A1 (de) * 1986-11-08 1988-05-11 Kloeckner Humboldt Deutz Ag Verfahren und vorrichtung zur verhuettung schmelzbarer stoffe wie erzkonzentrat unter ausnuetzung des unverbrauchten reduktionsgases aus dem aufblasprozess im schmelzzyklon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202024001174U1 (de) 2024-06-19 2024-07-19 Richard Rupprecht Gmbh Mobiler Vergusskocher mit einem stufenlos regelbaren hydraulischen Fahrantrieb

Also Published As

Publication number Publication date
DE3629661A1 (de) 1988-03-10
AU1366688A (en) 1989-09-22
CA1327275C (fr) 1994-03-01

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